never done any harm to big oz, although he did slaughtered delfians. But that's not my point in the Hartik or Panthartik.
Delfos, this wouldn't be the Ozian Government, this would be Nomadic Fre'zhi armed and dangerous. On the ice they are free of Ozian Laws when they go out a far way. Right now it's the warmer months and the Fre'zhi migrate to the ice with their duzhu which require extreme cold for their hibernation. Even then, Ozian Fre'zhi recruits in the Army train up there and do daily patrols around the ice to prepare them for arctic combat. Though most nomadic Fre'zhi only arm themselves with Bolt-Action IA-7 rifles. You find some who own an I-19 assault rifle. The Army factions of Fre'zhi would have have more of the I-19s but not as much. Fre'zhi have found the IA-7 to be the most effective weapon in the Ozian Arctic. Though the I-19 doesn't jam much in the arctic, the people find it to be too inaccurate for far away shots. The IA-7 doesn't jam and it can fire at long distances.
Even then, Ozians have been gaining water supremacy underneath the ice with Jumper Attack Subs (don't jump they just gained the name when it was a prototype and it went airborne out of the ice) and Idovk Submarines.
I'm just giving you the real truth Delfos, going into the north pole of Taijitu is suicide. Even if a nation like Xyrael, SD, Mor'os, or G-C sent an expedition, they would be taken out equally as you would be.